Shut-off valve.



W. SCHULZE & H. A. SMITH.

SHUT-OFF VALVE.

APPLICATION FILED DEC.8. I911.

1,187,662. Patented June 20,1916.-

2 SHEETS SHEET I.

Pa! main and 2 i 5px Hal/i puswi M23 30 Hf i to Figs.

building, where it will be readily accessible in time of danger. By referring es ecially sheave'26 deflects the cord in such manner that when the cord ispulled the tendency will be to move sheave 26 and arm 16 'to- Ward the left (Fig. 1) thus releasing levers 13 and 10 and permitting valve 3 to close under the action of spring 6. It may happen, however, due to the action of the element or to injury from other causes that spring 6 will fail to close the valve. In our device, however, the end of the cord is attached to lever 10, and the eye 32 is so located that a pull on the cord pulls saidlever toward closed position; consequently it 18 immaterial whether the spring 6 is deflected to close the valve or not. The same pull which releases the levers l3 and 10 operates to positively close the valve.

The parts are so constructed that as soon as the arm 16 and pin 15 have released levers 10 and 15 and the latter have dropped to closed position, and the cord has been relaxed, the spring 24 throws arm 16 to the right and brings the lower end of the arm over the upper edge of lever 10. This serves to lock the valve in closed position and the valve cannot be again opened until the arm 16 has been pushed aside against the action of its spring 24 and may remain for the raising and resetting of the valve. It will thus be seen that in our device the same pull which releases the valve serves positively to close it, also that when the valve is closed it is automatically locked in closed position and remains so until the parts are manipu- ,lated to reset the valve.

Having thus described our invention, what we claim as new and desire to secure by Let-- ters Patent is ,1. A cut off valve comprising a valve casing, a valve adapted to seat in said casing, a spring tending to close said valve, a detent for holdingsaid valve open, and a cord connected to said valve for positively closing, it, said cord engaging said detent' and tending to retract the same when the cord iswpulled.

2 In combination, a valve casing, a valve tending to seat therein, a lever connected to the valve for controlling its movement, a detent engaging said lever for holding said valve open, and a pull cord attached to said lever for pulling it and thereby forcing the valve to closed position, said cord being deflected by said detent, and the force pro- 1, 5 and 6 it will be. seen t at the duced by a pull on the cord acting in a direction to retract said detent from said lever.

3. In combination, a valve casing, a valve tending to seat therein, a movable element connected to said valve for controlling its movement, a detent for engaging said movable element so as to hold valve in open l, In cmnbinalion. a valve, a casing therefor, a spring urging said valve to close, a lever positi ely connected to said valve whereby the valve may be positively held in either raised or lowered position by said lever, a detent adapted to engage said lever on either one of two opposite sides of said lever, said detent when engaging one side of said lever holding it in the valve open position and said detent when engaging the other side of said lever holding it in the valve closed position, a spring urging said detent into engagement with the lever, and means for retracting said detent to release said lever to permit said valve to close, said means subsequently pern'iitting said detent to return to position to hold said lever in valve closed position.

5. In combination, a valve, a casing therefor, a spring normally urging said valve to closed position, a main lever connected to the valve for controlling its movement, an auxiliary lever fulcrumed on the main lever, a detent arm having a projection normally engaged by said auxiliary lever fOMOldlng .the valve open, a fusible link cooperating with said detent projection to hold the valve open, said fusible link preventingmovement of the auxiliary lever on its fulcrum, and a spring urging said detent to a position to engage the lever and prevent the return motion thereof after it has been released.

6. In combination, a valve, a casing therefor, a spring normally urging said valve to closed position, a main lever fulcrumed in said valve casing and connected to the valve so as to control its position, an auxiliary lever fulcrumed upon said main lever, a. fusible link holding said levers together to prevent relative motion between them a swinging arm, a pin on said are: a nailed to engage said auxiliary lever so as lie move the same and thereby force the valve to closed position, said pull cord being trained over a portion of said arm and deflected so as to retract said pin and release the auxiliary lever When the cord is pulled.

7. In a shut ofi' valve, a valve casing, a valve adapted to seat therein, a lever outside of the casing having connections with the valve for controlling the latter, and a mannally operated pivoted element having a portion adapted to swing to a position hehind said lever to thereby hold the valve in closed position.

8. In it shut off valve, a valve easing, i1 valve adapted to seat therein, a lever consaid lever when the latter is in closed posi- 20 tion.

In witness whereof, we have hereunto subscribed our names in the presence of two Witnesses.

WILLIAM SCHULZE. HARRY A. SMITH.

Witnesses M. WALTER RONGSON, J r., WILLIAM G. GUNTHER. 

